Active Site Tailoring of Metal-Organic Frameworks for Highly Efficient Oxygen Evolution

Feng Hu, Deshuang Yu, Wen Jing Zeng, Zih Yi Lin, Silin Han, Yajie Sun, Hui Wang, Jianwei Ren, Sung Fu Hung, Linlin Li, Shengjie Peng

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The direct correlation between active sites and catalytic activity in multiple-component metal-organic frameworks (MOFs) is key to understanding their mechanism of oxygen evolution reaction (OER) but remains vague. Herein, supported multiple-site MOFs are adopted as model catalysts to quantitatively study the composition-dependent OER performance. Ni MOFs on Fe metal substrate possess the highest intrinsic OER activity with the Ni/Fe ratio of 1:2 in the presence of metal leaching of the substrate during synthesis. Further introducing a proper amount of Cu further boosts the OER performance of Cu-doped NiFe MOFs with an impressively low overpotential of 200 mV at 10 mA cm−2. Spectroscopic analysis with theoretical study indicates that the copper doping within the NiFe MOFs induces electron redistribution for high valence Fe sites with an optimized balance of OH/OOH adsorption and decreased energy barrier for improved OER. This work sheds light on the active site tailoring of MOFs which highly correlates with the OER activity.

Original languageEnglish
Article number2301224
JournalAdvanced Energy Materials
Volume13
Issue number29
DOIs
Publication statusPublished - 4 Aug 2023

Keywords

  • active site tailoring
  • in situ characterizations
  • multiple-component metal-organic frameworks
  • oxygen evolution reaction

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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